Lake Inari

Lake Inari (Finnish: Inarijärvi or Inari) is the third largest lake in Finland's Lapland. It covers 1,084 square kilometres (419 sq mi). The deepest point is 95 metres (312 ft). There are over 3,000 islands in the lake. The biggest islands are Kaamassaari, Mahlatti, Viimassaari and Roiro.

Inari's is located to north from Arctic Circle, still, water is not very cold.[1]